List Abbreviations

>>> from techminer2.refine.thesaurus.descriptors import list_abbreviations
>>> list_abbreviations(
...     #
...     # DATABASE PARAMS:
...     root_dir="example/",
... )
CLASSIFICATION (OF_INFORMATION)
COMPETITION (ECONOMICS)
FINANCIAL_TECHNOLOGY (FINTECH)
INTERNET_OF_THING (IOT)
NETWORKS (CIRCUITS)
PRESSES (MACHINE_TOOLS)